Question

A teacher asks her 20 students to each write a book report, but 6 students do not complete the assignment. The teacher randomly chooses 5 students to present their reports. What is the approximate probability the teacher has selected only students who completed the assignment? 8% 13% 17% 19%

Answer 1

13%

Explanation:

When the teacher selects the first student, there is a 14/20 probability that the student completed the assignment.

When the teacher selects the second student, there is a 13/19 probability that the student completed the assignment.

Repeating the pattern, the total probability is:

P = (14/20) (13/19) (12/18) (11/17) (10/16)

P = 0.13

Answer 2

13% hope this helped! :)